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Running 2 or 3 dissimilar blocks in parallel instead of series?

post #1 of 7
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Is it even possible to run for example, gpu and mobo vrm blocks in parallel. Or cpu, gpu, and mb vrm? Would that even work, or would the most restrictive one starve? Since water will take path of least resistance.
I do have a large restrictive loop. 3 x AMS rads, AQ Cuplex Kryos cpu block and AQ Kryographic titan block, and Heatkiller vrm/mosfet blocks. Mcp35X2 pump, going in a Caselabs.

So what do ya think? I don't HAVE to do parallel but I think I was real close to going under 1 gpm flow with everything in series. Also aesthetically would look bettter if I did parallel.
post #2 of 7
How would you run CPU/mobo blocks in parallel? The only way I could think of doing that is if you use fittings as splitters, but in the end they still will have one inlet and one outlet. You can do it on the GPU blocks because there are more inlet/outlets, but it has no effect on temperatures and will slow down your loop. I guess you can do it for the look, but it doesn't make much sense to me.

Path of least resistance? Water isn't electricity, it will flow wherever there is a hole lol.
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post #3 of 7
Its not ideal because as you say the varying restriction could mean very different flow rates in each block. If we look at 3 different blocks and assume say 9 PSI coming from the pumps, that pressure will be split evenly between each block, so 3 PSI



That means a bit over 1 GPM on the GPU



If that is combined with a lower restriction CPU block ( haven't seen proper numbers for the AC CPU block or the VRM block) like a raystorm 3PSI is over 2 GPM through it.

Another block like this RAM block


and the flow rate would be extremely high ... provided the pump could still maintain the 9PSI at very high flow rates. That is not likely at all though.

In this case that means extreme flow rate through the pumps just to maintain the 1GPM through the GPU block because it is most restrictive. In fact with these 3 blocks the pumps are still unlikely to be able to put 1 GPM through the GPU because it is working at such a high flow rate for the other 2 blocks. The pump pressure falls with the higher flow rates and each block falls under the 2+ PSI needed for 1GPM through the AC GPU block.

The differences will be much less if the restriction of each block is closer, and the restriction of the AC Kryos does seem to be much higher than other CPU blocks, but it still means that the total flow rate of all blocks has to run through the pumps. Conservatively that could mean 3GPM+ through the pumps and seeing as they put out more heat the higher the flow rate it might cancel out any benefit of the improved flow rate through individual blocks.

Its sort of fact of life that Aquacomputer gear is designed for lower flow rates. Expecting or trying to maintain the 1+ GPM of high flow equipment like EK is probably more trouble than its worth.
Edited by Jakusonfire - 9/27/13 at 11:02pm
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post #4 of 7
Quote:
Originally Posted by Arm3nian View Post

How would you run CPU/mobo blocks in parallel? The only way I could think of doing that is if you use fittings as splitters, but in the end they still will have one inlet and one outlet. You can do it on the GPU blocks because there are more inlet/outlets, but it has no effect on temperatures and will slow down your loop. I guess you can do it for the look, but it doesn't make much sense to me.

Path of least resistance? Water isn't electricity, it will flow wherever there is a hole lol.

Electricity and water are the same typer.gif They both will take a path with less resistance. (note; talking flow rates v current)
Quote:
Originally Posted by Jakusonfire View Post

Its not ideal because as you say the varying restriction could mean very different flow rates in each block. If we look at 3 different blocks and assume say 9 PSI coming from the pumps, that pressure will be split evenly between each block, so 3 PSI Warning: Spoiler! (Click to show)



That means a bit over 1 GPM on the GPU



If that is combined with a lower restriction CPU block ( haven't seen proper numbers for the AC CPU block or the VRM block) like a raystorm 3PSI is over 2 GPM through it.

Another block like this RAM block

and the flow rate would be extremely high ... provided the pump could still maintain the 9PSI at very high flow rates. That is not likely at all though.

In this case that means extreme flow rate through the pumps just to maintain the 1GPM through the GPU block because it is most restrictive. In fact with these 3 blocks the pumps are still unlikely to be able to put 1 GPM through the GPU because it is working at such a high flow rate for the other 2 blocks. The pump pressure falls with the higher flow rates and each block falls under the 2+ PSI needed for 1GPM through the AC GPU block.

The differences will be much less if the restriction of each block is closer, and the restriction of the AC Kryos does seem to be much higher than other CPU blocks, but it still means that the total flow rate of all blocks has to run through the pumps. Conservatively that could mean 3GPM+ through the pumps and seeing as they put out more heat the higher the flow rate it might cancel out any benefit of the improved flow rate through individual blocks.

Its sort of fact of life that Aquacomputer gear is designed for lower flow rates. Expecting or trying to maintain the 1+ GPM of high flow equipment like EK is probably more trouble than its worth.

What they said, it can be done, with a lot of mathematics and home work. But also a big task. thumb.gif

Have seen it done before.
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post #5 of 7
Quote:
Originally Posted by ginger_nuts View Post

Electricity and water are the same typer.gif They both will take a path with less resistance. (note; talking flow rates v current)

I'm talking about a simple design. If you have a current, and two paths, the current will flow through the path of least resistance. If you have a stream of water, and two paths, the water will populate both.
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post #6 of 7
With a constant voltage, in a parallel circuit, with two different resistance, you will have current through both, but the current will be different depending on the resistance.

ie.

supply 240v
circuit 1 2ohms resistance
circuit 2 4ohms resistance


Current through circuit one will be 120Amps

Current through circuit two will be 60Amps

You will still have power to both circuits, but the current (flow) will be proportional.


The same works with pneumatics, If you have a supply of x L/s (voltage) and put a restriction (ohms) on circuit one of say 1psi, you will have twice the flow (current) of the parallel circuit with a 2psi resistance. You will still have flow through both, but not the same amounts.
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post #7 of 7
Quote:
Originally Posted by ginger_nuts View Post

With a constant voltage, in a parallel circuit, with two different resistance, you will have current through both, but the current will be different depending on the resistance.

ie.

supply 240v
circuit 1 2ohms resistance
circuit 2 4ohms resistance


Current through circuit one will be 120Amps

Current through circuit two will be 60Amps

You will still have power to both circuits, but the current (flow) will be proportional.


The same works with pneumatics, If you have a supply of x L/s (voltage) and put a restriction (ohms) on circuit one of say 1psi, you will have twice the flow (current) of the parallel circuit with a 2psi resistance. You will still have flow through both, but not the same amounts.

Precisely what my original post said, water will flow everywhere regardless of flow rate. If he designs it incorrectly, it can actually create a destructive flow.

Also, take a lightning bolt for example, it will take the shortest path (path of least resistance) to the ground. You can't make an analogy using water for that.
Edited by Arm3nian - 9/28/13 at 5:43pm
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